This is the syndication feed for photonics.com: Spectroscopy. https://www.photonics.com/Splash.aspx?Tag=Spectroscopy Mon, 09 Oct 2023 21:56:46 GMT Fri, 06 Oct 2023 07:00:00 GMT 1800
The researchers used indirect OLED pumping to power the laser. They built an integrated device structure that efficiently coupled an OLED that had very high light output with a polymer-based, distributed feedback laser.

Most organic semiconductor lasers are optically pumped by another laser — a complicated, expensive process. Electrical pumping, which involves injecting a current to generate a population inversion, is challenging to achieve in organic...]]> https://www.photonics.com/Articles/OLEDs_Could_Be_Solution_to_Electrically_Driven/a69376 A69376 Fri, 06 Oct 2023 07:00:00 GMT
Terahertz (THz) waves can be used to probe the magnetic properties of new materials. Efficient THz wave generation could advance applications in energy harvesting, ultrafast electronics, and THz spectroscopy.

Bright, coherent THz light sources can be achieved via high-frequency, high-density charge currents. It is possible to produce strong current density that is several orders of magnitude higher than what is typically found in electronic devices, by exciting nanometer-scale, metallic interfaces with femtosecond laser pulses.

To harness the power of high-density charge currents for generating THz waves, researchers at Fudan University, Shanghai Research Center for Quantum Sciences, and Beijing Normal University developed an...]]> https://www.photonics.com/Articles/THz_Generation_Technique_Could_Transform_Field_of/a69368 A69368 Tue, 03 Oct 2023 07:00:00 GMT
Monroe Community College received a $5.1 million grant from the Department of Defense’s Manufacturing Engineering Education Program (MEEP) to fund its optics and photonics associate degree programs. The funding is part of $53 million recently distributed by the National Defense Education Program to 13 organizations. This is the second time Monroe has been awarded funding through the MEEP program, as the nation’s first community college to administer associate degrees in precision optics.

The collaboration will use ASMPT’s hardware and Teramount’s optical elements. Courtesy of Teramount.
REGENSBURG, Germany — ASMPT AMICRA, a supplier of ultrahigh-precision die attach equipment, and Teramount Ltd., a...]]> https://www.photonics.com/Articles/Monroe_CC_Awarded_5M_by_DOD_ASMPT_AMICRA/a69363 A69363 Fri, 29 Sep 2023 07:00:00 GMT
In 2000, Berthold Leibinger, the man who brought laser technology into Germany’s TRUMPF Group, established the Innovation Award — expressed in native German as the “Innovationspreis” — to honor outstanding R&D in the field of laser technology. Next to this prestigious award, the Berthold Leibinger Zukunftspreis was added in 2006 to recognize scientists driving fundamental laser research to new heights.

Leibinger sadly passed away a few weeks after the Innovationspreis ceremony in 2018, but he had handed the company over to his children years before, along with the Berthold Leibinger Foundation and its associated awards.

At the 2023 ceremony, held on September 22 in Ditzingen, the Foundation...]]> https://www.photonics.com/Articles/Berthold_Leibinger_Awards_Honor_Laser_Research_at/a69354 A69354 Tue, 26 Sep 2023 09:45:00 GMT
The ability to measure the size and color of the light at the same time could improve a crucial step in chipmaking — lithography — by enabling lithography machines to make smaller, faster chips. To produce the microsize chips used in most electronic devices, lithography machines need precision-engineered lenses, mirrors, and light sources.

“Traditionally, we could only look...]]> https://www.photonics.com/Articles/Precise_Measuring_Tool_for_Light_Source_Could/a69335 A69335 Tue, 19 Sep 2023 07:00:00 GMT
In 2018, when California became the first state to pass legislation requiring the measuring of microplastics in drinking water supplies, it essentially set off a competition that would pit photonic technologies against one another as well as nonphotonic counterparts. To determine which technologies could most precisely, consistently, and cost- effectively measure microplastics, California’s State Water Resources Control Board, or State Water Board, recruited 22 laboratories to evaluate several analytical methods.


A comparison of remote water monitoring with multispectral and hyperspectral imaging. Courtesy of Pixxel.
In July 2022, the board released the interlaboratory comparison results. A month later, it essentially...]]> https://www.photonics.com/Articles/Spectroscopy_Rides_a_Rising_Tide_of/a69320 A69320 Wed, 13 Sep 2023 09:32:52 GMT
A team at Harbin Institute of Technology led by professor Yufei Ma introduced an approach to phase demodulation of heterodyne light-induced thermoelastic spectroscopy (H-LITES) that uses a Fabry-Pérot interferometer (FPI). Compared with traditional intensity demodulation systems, the new phase demodulation method is structurally simple and is resistant to interference from light sources and the surrounding environment when the LITES technique is used.
Diagram of the experimental setup. Pictured: continuous-wave distributed feedback (CW-DFB), fiber collimator (FC), photodetector (PD), quartz tuning fork (QTF), and single-mode fiber (SMF). Courtesy of Z. Lang et al.
LITES provides extremely high-sensitivity and noncontact...]]> https://www.photonics.com/Articles/LITE_Spectroscopy_Resists_Light_Sources_with/a69315 A69315 Tue, 12 Sep 2023 07:00:00 GMT
Axithra, a spinout of imec and Ghent University, has raised €10 million ($10.7 million) in a seed round to develop a chip-based Raman spectroscopy platform to monitor drug concentration in the blood to enable timely adjustments of dosages where necessary. The seed round, which saw backing from Hamamatsu, secures the first two years of research and development.

According to Roel Baets, a professor in the Photonics Research Group, an associated imec lab at Ghent University, the integration of Raman spectroscopy onto a photonic chip makes the technique far more sensitive.

As a first application, the spinoff will deploy its technology to measure the concentration of beta-lactam antibiotics in a patient’s blood. This...]]> https://www.photonics.com/Articles/Ghent_University_imec_Spinout_Axithra_Raises_10M/a69299 A69299 Thu, 07 Sep 2023 07:00:00 GMT
The trials are set to span the next two years. Peter Soto, who is director of the MIT LBRC, and MIT’s Jeon Woong Kang and Apollon’s Youngkyu Kim will lead the effort. Kang, in previous research, demonstrated direct measurements of glucose concentration without drawing blood by irradiating the skin of pig test subjects with laser light. The...]]> https://www.photonics.com/Articles/Apollon_MIT_to_Collaborate_on_Noninvasive/a69279 A69279 Mon, 28 Aug 2023 07:00:00 GMT
Raman spectroscopy is a useful tool for identifying microplastics — plastic particles smaller than 5 mm — although conventional point confocal Raman methods are limited to single-point detection, limiting the detection speed. A line-scan Raman spectroscopy method developed by the Chinese Academy of Sciences and Cardiff University significantly boosts detection speed for both micro- and nanoplastics.

The researchers reported a line-scan Raman microspectroscopy system capable of rapid imaging and chemical identification of microplastics down to 2000 nm in size, and capable of imaging a 40- × 10-µm particle in 10 s, representing a speed improvement by about two orders of magnitude compared to confocal imaging.
...]]> https://www.photonics.com/Articles/Line-Scan_Raman_Spectroscopy_Detects_Micro-_and/a69276 A69276 Fri, 25 Aug 2023 07:00:00 GMT
A thin-film, amplitude-only spatial light modulator made from phase-change-based material was developed by researchers at the University of Exeter and the Institute of Optics in Madrid.

The device operates in reflection and modulates the amplitude of light incident on its surface with virtually no changes to the optical phase. When the phase-change material is switched between its amorphous and crystalline states, there is no effect on optical phase.

Because phase-change materials can be switched on sub-microsecond timescales, the chalcogenide-based device could provide a route to the development of ultrafast spatial light modulators, with applications in fields such as wavefront shaping, communications, sensing, and imaging....]]> https://www.photonics.com/Articles/Amplitude-Only_Light_Modulator_Could_Improve/a69257 A69257 Mon, 21 Aug 2023 07:00:00 GMT
Diffuse in vivo flow cytometry (DiFC), an optical technique developed at Northeastern University, enables fluorescence detection of tumor cells circulating in the bloodstream. It is a promising technique for detecting cancer that has metastasized. However, due to signal-to-noise ratio (SNR) constraints, which are attributed mainly to background autofluorescence in the tissues, DiFC’s measurement depth is limited.

A team from Tufts University and Northeastern University is working to address this issue and take the DiFC method developed by the Northeastern group to a new level. The researchers are investigating whether a new method developed by the Tufts group, called the dual-ratio (DR) approach, can minimize noise and...]]> https://www.photonics.com/Articles/Optical_Measurement_Methods_Combine_to_Detect/a69231 A69231 Thu, 10 Aug 2023 07:00:00 GMT
Lidar developer Hesai Technology collaborated with NVIDIA to integrate Hesai’s AT128 automotive-grade, ultrahigh-resolution long-range lidar into the NVIDIA DRIVE and NVIDIA Omniverse ecosystems. Hesai’s AT128 lidar comprises128 independent VCSEL laser transmitters, achieving 1.53 million data points per second and a detection range of 200 m. NVIDIA DRIVE and Omniverse comprise AI, simulation, and software development platforms relevant to the autonomous driving industry and its development.

CAMBRIDGE, England — Kubos Semiconductors, a microLED material technology company, won a £700,000 ($889,171) Future Economy Investor Partnerships grant from Innovate UK. The grant is for a 24-month project to achieve 5%...]]> https://www.photonics.com/Articles/Red_MicroLED_Developer_Secures_Funding_Hesai/a69213 A69213 Fri, 04 Aug 2023 07:00:00 GMT
Researchers at Hefei University of Technology have demonstrated the use of laser-induced breakdown spectroscopy (LIBS) to automatically identify, classify, and subclassify recyclable waste in real time. The resource re-use application enabled the researchers to identify and sort samples, based on material composition, into six consumer-level categories: paper, plastic, glass, metal, textile, and wood.

The detection method holds promise as a solution for the environmental protection and waste management fields, where improved solutions to identifying and automatically classifying recyclable waste are essential to environmental sustainability.

To maximize the re-use of material, waste products must be disposed of based on their...]]> https://www.photonics.com/Articles/Spectroscopy_Machine_Learning_Pair_to_Ease/a69209 A69209 Thu, 03 Aug 2023 07:00:00 GMT
Researchers from the University of Toulouse have developed a method to fabricate a microlens that could enable more effective portable gas sensing technologies. The researchers used two-photon-polymerization 3D printing to fabricate a microlens that could enable vertical cavity surface emitting lasers (VCSELs) for use in ammonia gas detection.

The work demonstrates the potential of two-photon polymerization as a fast and accurate technique for VCSEL collimation at a post-mounting stage. In addition, the researchers said that it paves the way toward the development of optimized laser chips directly integrable in portable optical sensing systems.

Portable gas sensors are in high demand for environmental, health sciences, and...]]> https://www.photonics.com/Articles/Lens_Fabrication_Clears_Way_for_Sensors_Optimal/a69191 A69191 Mon, 31 Jul 2023 07:00:00 GMT
Through its existing European subsidiary Photonics Management Europe srl, Hamamatsu Photonics submitted an application to the Danish Business Authority to acquire shares in NKT Photonics. The acquisition would result in NKT being made subsidiary to Photonics Management Europe and sub-subsidiary to Hamamatsu. The application is a follow-up to Hamamatsu’s June 2022 bid to acquire NKT Photonics — a move that the Danish Business Authority blocked in May this year. Hamamatsu said it will conduct activities to obtain approval promptly, including consultations with relevant Danish authorities.

MERIGNAC, France — Sensor and imaging technology developer Photonis acquired El-Mul, a developer and manufacturer of...]]> https://www.photonics.com/Articles/Hamamatsu_Refiles_for_NKT_Photonics_Acquisition/a69199 A69199 Fri, 28 Jul 2023 07:00:00 GMT
The complementary strengths of fluorescence and vibrational microscopy are combined in a new technique developed at Caltech, which is called bond-selective fluorescence-detected infrared-excited spectro-microscopy (BonFIRE). BonFIRE will benefit biological investigations by providing researchers with rich chemical information as well as single-molecule sensitivity.

“With our new microscope, we can now visualize single molecules with vibrational contrast, which is challenging to do with existing technologies,” researcher Dongkwan Lee said.

Fluorescence microscopy allows researchers to observe single molecules, but it does not provide detailed chemical information about molecular distributions. Vibrational microscopy...]]> https://www.photonics.com/Articles/Microscopy_Method_Uses_Infrared_Light_to_Image/a69144 A69144 Fri, 07 Jul 2023 07:00:00 GMT
Resolve Optics installed and commissioned a new vibration test center adding to the suite of in-house lens-testing equipment the company is able to offer. Lenses used in harsh industrial inspection and military and space applications are often exposed to vibrations, shocks, temperature changes, radiation, and contaminants. The company’s new ETS MPA101-L215M Shaker, coupled with a DTC Venzo 880 controller, is certified and calibrated in accordance with ISO standards, which enables Resolve Optics to not only carry out all the common forms of vibration testing, but also undertake specialist vibration/shock qualification tests in accordance with customer requirements.
Resolve Optics’ new ETS MPA101-L215M vibratory shaker coupled...]]> https://www.photonics.com/Articles/Resolve_Optics_Opens_Test_Center_Week_in_Review/a69145 A69145 Fri, 07 Jul 2023 07:00:00 GMT
A team of researchers at the University of Ottawa developed a terahertz (THz) spectroscopy technique for recording movies in real time at 50,000 fps.

High-speed video captures and slow-motion movies allow scientists to observe the mechanical dynamics of complex phenomena in detail. When the images in each frame are replaced by THz waves, the movies make it possible to monitor low-energy resonances and fast structural and chemical transitions in sample materials. As a result, the THz spectroscopy system, developed in collaboration with researchers from the Max Planck Institute for the Science of Light, could become a powerful tool for observing phenomena that are currently impossible to investigate because they are too fast,...]]> https://www.photonics.com/Articles/Time-Resolved_Spectroscopy_Peers_in_on/a69118 A69118 Mon, 26 Jun 2023 07:00:00 GMT
ADVA Optical Networking SE’s proposed name change to Adtran Networks SE was approved by the 2023 Annual General Meeting of ADVA Optical Networking SE on May 24. The change was registered in the commercial register of the local court of Jena, Germany, on June 8. The name change is a further step for the combination between ADVA and Adtran Holdings, which began with the conclusion of the business combination agreement between the companies in 2021.
A $57.3 million research initiative has been launched at the National University of Singapore (NUS) to boost innovation and research on advanced solar cell technologies in Singapore. Over the next five years, the REC@NUS Corporate R&D Laboratory for Next Generation Photovoltaics will...]]> https://www.photonics.com/Articles/ADVA_Rebrands_as_Adtran_Networks_SE_Swave/a69116 A69116 Fri, 23 Jun 2023 07:00:00 GMT